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Site Report: ARRC Henderlong Building Seward

Site Name: ARRC Henderlong Building Seward
Address: Seward Lease 7379 Port Avenue, Seward, AK 99664
File Number: 2332.38.033
Hazard ID: 4416
Status: Cleanup Complete
Staff: ,
Latitude: 60.123961
Longitude: -149.422800
Horizontal Datum:WGS84

We make every effort to ensure the data presented here is accurate based on the best available information currently on file with DEC. It is therefore subject to change as new information becomes available. We recommend contacting the assigned project staff prior to making decisions based on this information.


During excavation of a UIC well, benzene and toluene were found in soil at concentrations above ADEC method two cleanup levels. Groundwater had not been characterized as of site intake, however the site is located adjacent to Resurrection Bay and high chloride levels were recorded in site groundwater.

Action Information

Action Date Action Description DEC Staff
11/1/2006 Site Characterization Report Approved Limited Phase II removed 2, 55-gallon drums of contaminated soil from the area around a floor drain, Class V UIC well. Soil samples contained benzene and toluene above Method 2 cleanup levels. A sample from the on-site drinking water well did not contain contaminants above MCLs. Bill O'Connell
4/5/2007 Site Characterization Report Approved Additional limited Phase II sampling from the open excavation from October 2006 and from the stockpiled soil. Benzene and toluene found above Method Two cleanup levels with max benzene at 0.385 mg/kg and toluene at 6.06 mg/kg. Benzene also above Method Two in stockpile samples. Bill O'Connell
4/27/2007 Exposure Tracking Model Ranking Intial Ranking Completed Mitzi Read
4/27/2007 Site Added to Database Site added to the database. Mitzi Read
6/2/2008 GIS Position Updated Position verified via Google Earth Grant Lidren
6/13/2008 Site Characterization Workplan Approved Work Plan for Phase 2 Investigation, dated June 13 2008, submitted by Clarus, and recieved by the ADEC on this date. The work plan proposes to sample soil stockpiles on site and analyze groundwater for GRO and BTEX. Grant Lidren
11/10/2008 Report or Workplan Review - Other Groundwater and Stockpile Sampling Report Henderlong Site, dated October 10, 2008, submitted by Clarus, and received/reviewed by ADEC on this date. Two stockpile soil samples and one duplicate were tested for BTEX and GRO. Benzene at 0.773 mg/kg was the only analyte above ADEC cleanup levels. Reportedly the stockpile has been removed and has/is going to be thermally treated as ASR. Two GW samples and one duplicate taken from temporary MWs were also tested for BTEX and GRO. The only analyte detected was benzene at 0.00179 mg/kg, which is well below ADEC cleanup levels. Grant Lidren
12/11/2008 Report or Workplan Review - Other ADEC reviewed Soil Transport Confirmation Former Henderlong Site Seward, Alaska, dated December 5, 2008, submitted by Clarus, and received by ADEC on December 11, 2008. The onsite stockpile was removed and transported to ASR in Anchorage. On September 29, 2008 ASR received 24 cubic yards of benzene impacted soil for treatment. Grant Lidren
1/26/2009 Cleanup Complete Determination Issued The Alaska Department of Environmental Conservation (ADEC), Contaminated Sites Program, has completed review of the environmental records associated with ARRC Henderlong Building, Seward. Based on the information provided to date, the ADEC has determined that the contaminant concentrations remaining on site do not pose an unacceptable risk to human health or the environment, Therefore, the site is closed. This decision is based on the administrative record for ARRC Henderlong Building Seward, which is located in the offices of the ADEC in Anchorage, Alaska. Grant Lidren

Contaminant Information

Name Level Description Media Comments
Benzene Between Method 2 Migration to Groundwater and Human Health/Ingestion/Inhalation Soil

Control Type

Type Details
No ICs Required


Description Details
Advance approval required to transport soil or groundwater off-site.

Missing Location Data

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